TY  - RPRT
TI  - Stool collection for occult blood testing.
AU  - B Littenberg
PY  - 1988
DO  - 10.7326/0003-4819-109-4-347_2
UR  - https://pubmed.ncbi.nlm.nih.gov/3395049/
ID  - 3395049
ER  -